So at Max corruption you have School, Park, East, South, Bathhouse, and Convenience Store. You will need a 1,000 energy, 1ap, and $10,000. If you have problems doing the bathhouse, talk to the receptionist till she's asleep then walk by her. Once the Corruption is maxed the Recollection room opens and you can get infinite money, ap, and energy.
To get Max Corruption just keep paying her, doesn't need to be super large amount either, its purely how many times you do it, while occasionally asking for "Even more assistance" and pushing forward till you get a "Skip the first time raw" scene. That is the sign she is maxed out. Heads up though, it takes 3,600 energy, 24ap, and 40,000 for a full sex scene.
Have fun.